VW MKII A2 MK2 Golf Jetta Fox Service Manual - VAGLinks.com

18.3a Unscrew the bolts . . . 18.3b . . . and remove heater element from
inlet manifold
2 To check the heater element, the engine
should be cold. Disconnect the wire from the
element at its in-line connector, then attach an
ohmmeter between the wire connector from
the element and earth. This should record
0.25 to 0.50 ohm.
3 To remove the element, disconnect the wire
then unscrew the bolts and withdraw the unit.
Remove the sealing ring and gasket (see
illustrations). When refitting, always renew
the sealing ring and gasket.
Thermo-switch
4 On 1.05 and 1.3 litre engines, the heater
element is controlled by a thermo-switch
located in the coolant supply hose to the inlet
manifold. On 1.6 and 1.8 litre engines, the
thermo-switch is located in the top of the
coolant hose connecting piece mounted on
the side of the cylinder head.
19.4 Vacuum hose connections – 1.6 and 1.8 litre with
Pierburg/Solex 2E2 carburettor
Fuel and exhaust systems - carburettor models 4A•21
5 Before removing the thermo-switch, drain
off some engine coolant to reduce spillage
when the switch is removed.
6 To test the thermo-switch, first detach the
lead connector. Unscrew and remove the
switch from the housing and plug the hole to
stop any leakage of coolant.
7 With an ohmmeter connected to the
terminals, gradually heat the base of the
switch unit in hot water. Below the following
temperatures there should be zero resistance
(ie. internal contacts closed):
1.05 litre engine - 65°C
1.3, 1.6 and 1.8 litre engines - 55°C
8 Above the following temperatures there
should be a maximum resistance (ie. internal
contacts open):
1.05 litre engine - 75°C
1.3, 1.6 an d 1.8 litre engines - 65°C
9 If defective, the switch must be renewed.
1081 VW Golf & Jetta
18.3c Removing sealing ring from heater
element
19 Inlet and exhaust manifolds -
removal and refitting 3
Inlet manifold
1 Remove the carburettor.
2 Disconnect the inlet manifold preheater
wire at the in-line connector.
3 Drain the cooling system and disconnect
the coolant hoses from the manifold.
4 Disconnect the manifold vacuum hoses as
necessary (see illustration).
5 Where applicable, disconnect the stay rod
between the base of the manifold and the
crankcase (see illustration).
6 Undo the manifold retaining nuts and bolts
(see illustration) whilst noting their respective
4A